<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
      <title>幾何比對 | HiAPI-C# 2025 </title>
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <meta name="title" content="幾何比對 | HiAPI-C# 2025 ">
      
      
      <link rel="icon" href="../../../../../img/HiAPI.favicon.ico">
      <link rel="stylesheet" href="../../../../../public/docfx.min.css">
      <link rel="stylesheet" href="../../../../../public/main.css">
      <meta name="docfx:navrel" content="../../../../../toc.html">
      <meta name="docfx:tocrel" content="../../toc.html">
      
      <meta name="docfx:rel" content="../../../../../">
      
      
      
      <meta name="loc:inThisArticle" content="In this article">
      <meta name="loc:searchResultsCount" content="{count} results for &quot;{query}&quot;">
      <meta name="loc:searchNoResults" content="No results for &quot;{query}&quot;">
      <meta name="loc:tocFilter" content="Filter by title">
      <meta name="loc:nextArticle" content="Next">
      <meta name="loc:prevArticle" content="Previous">
      <meta name="loc:themeLight" content="Light">
      <meta name="loc:themeDark" content="Dark">
      <meta name="loc:themeAuto" content="Auto">
      <meta name="loc:changeTheme" content="Change theme">
      <meta name="loc:copy" content="Copy">
      <meta name="loc:downloadPdf" content="Download PDF">

      <script type="module" src="./../../../../../public/docfx.min.js"></script>

      <script>
        const theme = localStorage.getItem('theme') || 'auto'
        document.documentElement.setAttribute('data-bs-theme', theme === 'auto' ? (window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light') : theme)
      </script>

  </head>

  <body class="tex2jax_ignore" data-layout="" data-yaml-mime="">
    <header class="bg-body border-bottom">
      <nav id="autocollapse" class="navbar navbar-expand-md" role="navigation">
        <div class="container-xxl flex-nowrap">
          <a class="navbar-brand" href="../../../../../index.html">
            <img id="logo" class="svg" src="../../../../../img/HiAPI.logo.png" alt="">
            
          </a>
          <button class="btn btn-lg d-md-none border-0" type="button" data-bs-toggle="collapse" data-bs-target="#navpanel" aria-controls="navpanel" aria-expanded="false" aria-label="Toggle navigation">
            <i class="bi bi-three-dots"></i>
          </button>
          <div class="collapse navbar-collapse" id="navpanel">
            <div id="navbar">
              <form class="search" role="search" id="search">
                <i class="bi bi-search"></i>
                <input class="form-control" id="search-query" type="search" disabled placeholder="Search" autocomplete="off" aria-label="Search">
              </form>
            </div>
          </div>
        </div>
      </nav>
    </header>

    <main class="container-xxl">
      <div class="toc-offcanvas">
        <div class="offcanvas-md offcanvas-start" tabindex="-1" id="tocOffcanvas" aria-labelledby="tocOffcanvasLabel">
          <div class="offcanvas-header">
            <h5 class="offcanvas-title" id="tocOffcanvasLabel">Table of Contents</h5>
            <button type="button" class="btn-close" data-bs-dismiss="offcanvas" data-bs-target="#tocOffcanvas" aria-label="Close"></button>
          </div>
          <div class="offcanvas-body">
            <nav class="toc" id="toc"></nav>
          </div>
        </div>
      </div>

      <div class="content">
        <div class="actionbar">
          <button class="btn btn-lg border-0 d-md-none" type="button" data-bs-toggle="offcanvas" data-bs-target="#tocOffcanvas" aria-controls="tocOffcanvas" aria-expanded="false" aria-label="Show table of contents">
            <i class="bi bi-list"></i>
          </button>

          <nav id="breadcrumb"></nav>
        </div>

        <article data-uid="Cmd-GeomDiff">
          <h1 id="幾何比對">幾何比對</h1>

<p>幾何比對指令 <a class="xref" href="../../../../../api/Hi.MachiningProcs.RuntimeApi.html#Hi_MachiningProcs_RuntimeApi_Diff_">Diff</a><small>(API)</small> 用於比對工件目標形狀(Target Shape)與仿真後形狀。</p>
<div class="NOTE">
<h5>Note</h5>
<p><strong>指令格式</strong></p>
<pre><code class="lang-csharp">Diff(&lt;掃描半徑(mm)&gt;);
</code></pre>
</div>
<p>&lt;掃描半徑&gt;(Detection Radius)是工件目標形狀的表面延伸距離，如果仿真後表面超過該距離，則不計算偏差值。
掃描半徑越大，計算時間越長。</p>
<div class="TIP">
<h5>Tip</h5>
<p><strong>指令範例</strong></p>
<pre><code class="lang-csharp">Diff(1);
</code></pre>
</div>
<p>比對後以顏色呈現過切與留料距離。</p>
<p>比對後工件表面的路徑索引將會失效。</p>
<h2 id="往復斜面干涉比對案例解析">往復斜面干涉比對案例解析</h2>
<p>CAM產生的NC碼未必如預期，與使用方式有關，許多參數可以調整，還要靠使用者的經驗與細心，所以需要誤差比對確定CAM產生的NC無誤。</p>
<p>本範例為CAM產生的NC，經過誤差比對發現諸多需修正處。</p>
<p>這些問題若不使用軟體輔助只能在加工結束後發現，對精密製造影響甚鉅。</p>
<h3 id="比對標的">比對標的</h3>
<p>以上下斜坡之幾何做干涉比對測試，切削模擬之刀具為R0.5mm、D12mm之牛鼻刀，切削路徑為往復移動。</p>
<p>比對標的、切削路徑如下：</p>
<p><img src="img/geom_compare_slide_design.png" alt="geom_compare_slide_design">
比對標的</p>
<p><img src="img/slide_resolution_0p1_with_path.png" alt="slide_resolution_0p1_with_path">
切削路徑</p>
<h3 id="結果與討論">結果與討論</h3>
<p>切削模擬後的干涉比對如下圖。</p>
<p><img src="img/diff_resolution_0p02.png" alt="diff_resolution_0p02">
切削模擬後的干涉比對。綠色為精準，正紅色為過切超過0.02mm、正藍色為留料超過0.02mm。</p>
<ul>
<li>目標幾何靠近壁面處為直角，故偵測出留料。</li>
<li>進刀段落往復區域的NC碼Z值不一致，故偵測到過切。</li>
<li>往復邊緣處刀子沒有走出刀具半徑，離工件距離過短，故偵測到留料。</li>
<li>往復路徑中的藍綠斑馬紋為往復間距過大造成的留料。</li>
</ul>

</article>

        <div class="contribution d-print-none">
        </div>

        <div class="next-article d-print-none border-top" id="nextArticle"></div>

      </div>

      <div class="affix">
        <nav id="affix"></nav>
      </div>
    </main>

    <div class="container-xxl search-results" id="search-results"></div>

    <footer class="border-top text-secondary">
      <div class="container-xxl">
        <div class="flex-fill">
          <span> Copyright © 2025 <a href='https://superhightech.com.tw'>Tech Coordinate</a>. All rights reserved. <a href='https://superhightech.com.tw'>超級高科技股份有限公司</a> © 2025 版權所有 </span>
        </div>
      </div>
    </footer>
  </body>
</html>
